Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 7370664 | Flow control device A flow control device having a control member for forming a seal with another part of the flow control device. The control member having a base material and a portion or surface that is a softer or more deformable than the base material or the portion of the control... | 05/13/2008 |
| 7311118 | Floating ball check valve In an improved floating ball check valve including a body having an outlet port, a cap, having an inlet port, joined with the body, a ball guide slidably received within the body and having a ball pocket for receiving a sealing ball, a biasing spring for biasing the... | 12/25/2007 |
| 7240740 | Diaphragm valve with pivoting closure member A valve is disclosed having an inlet duct aligned with an outlet duct and an angularly oriented elliptical seat positioned between them. A pressure chamber faces the seat. A pivoting valve closure member is positioned between the pressure chamber and the seat. An as... | 07/10/2007 |
| 7198250 | Piezoelectric actuator and pump using same Thin chamber diaphragm-operated fluid handling devices, including thin chamber pumps and thin chamber valves, facilitate device compactness and, in some configurations, self-priming. Diaphragm actuators of the thin chamber devices either comprise or are driven by pi... | 04/03/2007 |
| 7134642 | Vacuum gate valve The invention provides a vacuum gate valve for closing off an opening. The vacuum gate valve can have a valve plate that can be turned so that the alignment of the valve plate will adapt to a valve seat when the valve plate is pressed against the valve seat. ... | 11/14/2006 |
| 7128080 | Surge prevention device A surge prevention valve may be used to prevent the formation of an initial surge of high pressure. The valve may be located, for example, between a high pressure gas cylinder and a medical pressure regulator. The valve is provided with first and second valves locat... | 10/31/2006 |
| 7032882 | Valve assembly having novel flow characteristics A valve assembly including a housing having a flow channel and an annular surface surrounding the flow channel, a slide plate movable to a closed position, and a seal ring positioned between the annular surface and the slide plate. The seal ring includes a first and... | 04/25/2006 |
| 6994321 | Reciprocating ball valve The device described herein is a valve suitable for the control or shut-off of fluid flow in a piping system. It comprises a valve housing having inlet and outlet ports and a cylindrical bore whose axis is slanted at about 45 degrees in relation to the axis connecti... | 02/07/2006 |
| 6629682 | Vacuum valve A vacuum valve comprises a wall with a valve opening and a valve seat, a valve plate which is pressed against the valve seat in the closed state, an elastic sealing ring which is arranged at the valve plate or at the valve seat and, in the closed state of... | 10/07/2003 |
| 6623012 | Poppet valve seat for an integrated pressure management apparatus A seal for a poppet valve of an integrated pressure management apparatus, a valve system using the poppet valve seal, and a method of cleaning debris off of a poppet valve. The poppet valve is movable between an open position permitting fluid flow through... | 09/23/2003 |
| 6497248 | Pressure relief device with one piece gasket Disclosed is a pressure relief valve for attachment to a closed vessel having an opening to vent gas and liquids from the housing should the internal housing pressure rise to unacceptable levels. The pressure relief valve includes a single gasket that sea... | 12/24/2002 |
| 6427711 | Inline check valve An inline check valve having a piston member and a seat in a valve body having a larger diameter at the end thereof away from the piston. The seat is retained within a groove by a seat retainer which prevents removal of the seat from the groove without de... | 08/06/2002 |
| 5749394 | Check valve including molded valve seat A ball check valve including a housing and a ball element movably positioned in the housing. An insert member is located at an inlet port of the housing, and an elastomeric element is molded directly onto the insert member and is positioned facing toward ... | 05/12/1998 |
| 5603354 | Volumetric pump/valve A volumetric pump for administering intravenous fluids to a patient comprises a housing having an elongate cavity therein with an open and a closed end. A resilient sheet of material having a centrally-located aperture covers the open end, and a pump shaf... | 02/18/1997 |
| 5580031 | Stop valve A stop valve which is in particular constructed as a valve top for a sanitary fitting, contains an actuating member constructed as a rotary spindle. The actuating member, which is held in axially non-displaceable manner, engages with a hexagonal neck in a... | 12/03/1996 |
| 5375813 | Soft seat valve A valve having a valve body, a valve plug and a deformable valve seat. A generally annular, wedge-shaped space is provided between a portion of the valve seat and a seat support in the valve body. Closing the valve brings the valve plug into single line c... | 12/27/1994 |
| 5297580 | High pressure ball and seat valve with soft seal A valve seat for a ball valve of a positive displacement pump for producing fluid from a subsurface formation wherein the valve seat is provided by a valve assembly having a non-corrosive hollow metallic housing therein which may have an internal radial g... | 03/29/1994 |
| 5215286 | High pressure diaphragm valve A diaphragm valve for high pressure use has a metal diaphragm which is actuated into and out of direct engagement with a valve seat by an air operator acting through a force multiplying lever assembly. The valve seat is confined by rigid interior and exte... | 06/01/1993 |
| 5190074 | Check valve apparatus Check valve apparatus for a fluid flow operates in response to a positive pressure of the fluid to move a spring biased diaphragm and valve element off its seat to allow the fluid to flow through the apparatus. When the pressure of the fluid flow drops, t... | 03/02/1993 |
| 5188150 | Valve assembly A valve assembly which comprises an upper valve assembly and a lower valve assembly. The upper valve assembly includes a valve body, a spring retainer and an upper spring. The lower valve assembly includes a retainer ring, an O-ring and a valve seat membe... | 02/23/1993 |
| 5183273 | Sealing gasket for a control valve A sealing ring made up of nestable elements is constructed by forming a basic cylindrical-frustoconical element having the function of withdstanding the height variations which are liable to be produced by a force exerted on the sealing ring in its axis o... | 02/02/1993 |
| 5139042 | Valve seat and method of repair A valve seat for a valve used with a treater tank comprising a body having a generally cylindrical bore therethrough, the body having a first end, a second end and being made of metal, the first end having a counterbore concentric with the cylindrical bor... | 08/18/1992 |
| 5103859 | Float chamber A valve for use in the float chamber of a boiling water unit. The valve consists of a body of circular horizontal cross section having a vertical outer wall. The inner portion of the valve body includes a central circular cut-out seat portion to accommoda... | 04/14/1992 |
| 5063961 | Screw-type valve housing The stepped borehole and the valve housing are normally provided with cylindrical circumferential sections, which have been subjected to fine finishing and which are in exact axial alignment with the borehole axis, O-rings being provided as sealing elemen... | 11/12/1991 |
| 5029810 | High performance damper blade and damper seal combination A high performance damper blade and damper blade seal combination including a damper blade having a planar portion perpendicular to the damper blade and a damper blade seal including a base and two upwardly extending legs. One leg of the damper blade seal... | 07/09/1991 |
| 5007446 | Temperature actuated flow control device A flow control device, such as a valve, has a valve body which has a fluid holding chamber therein. An inlet in the valve body couples the chamber to a source of pressurized fluid. An outlet in the valve body couples the chamber to downstream devices such... | 04/16/1991 |
| 4971287 | Solenoid operated flush valve and flow control adapter valve insert therefor A solenoid operated flush valve has a main flush valve body including water inlet and outlet means. The main flush valve body includes generally horizontally extending nipple means which is in fluid communication with the water inlet and outlet means. A f... | 11/20/1990 |
| 4945941 | Means to reduce vibration in check valves and stop/check valves caused by pulsating low fluid flow In a check valve or stop/check valve comprising a housing having an inlet port, an outlet port and a valve seat between the two ports, a valve disc moves axially within a valve housing between open and closed positions, so that fluid flow applies pressure... | 08/07/1990 |
| 4915354 | Cushioned valve seat A valve employed in applications where the valve is rapidly cyclically opened and closed over extended periods of time is constructed in a manner such that the impact between a rapidly moving metal valve head and metal valve seat at valve closure is minim... | 04/10/1990 |
| 4901976 | Flow control valve A fluid flow control valve for a fixture having a conduit for the passage of a fluid through the fixture comprises a valve rod that is manually slideable through a hole in the fixture to intercept the conduit at right angles. The rod has a plurality of va... | 02/20/1990 |
| 4865136 | Pressure relief valve for roller bit A one-way pressure relief valve assembly is provided for venting the lubricant reservoir of a roller-type well drilling bit. The valve assembly is mounted in the cap of the lubricant reservoir, to open outwardly, and is adapted to provide hydrostatic load... | 09/12/1989 |
| 4846442 | Gate valve with lock ring A packingless gate valve is disclosed which includes a housing having opposed similar housing halves with pipe nipples extending therefrom and with resilient sleeve units installed on respective lock rings mounted in recessed portions of the housing halve... | 07/11/1989 |
| 4843187 | Gasket assembly and electrical power transformer including the same A gasket assembly including a base having a central opening and a circular slot having an undercut portion extending around the central opening, a circular gasket positioned in the circular slot and having a tapered side located proximate the undercut por... | 06/27/1989 |
| 4815697 | Depressurization valve A depressurization valve for use in relieving completely the pressure in a simplified boiling water reactor is disclosed. The normally closed and sealed valve is provided with a valve body defining a conduit from an outlet of a manifold from the reactor t... | 03/28/1989 |
| 4809739 | Check valve A swing check valve wherein the valve seat, disc and hanger for the disc are in the form of a replaceable cartridge which can be conveniently inserted in and removed from the valve chamber through one end of the valve body. The hanger is sized such that t... | 03/07/1989 |
| 4724862 | Drain valve There is disclosed an automatic drain valve which consists of a control block with a central bore and a coaxial inlet bore. The central bore and the inlet bore are divided from each other by a seal which is seated in the inlet bore and held in place by a ... | 02/16/1988 |
| 4611788 | Combination seat and seal device An improved integral combination seat and seal device which serves the dual function of providing a seat for a valve member and a circumferentially extending seal to prevent fluid leakage.... | 09/16/1986 |
| 4561634 | Seal of a cylinder head of an internal combustion engine A sealing arrangement of the cylinder head with respect to the cylinder block by means of a flat seal which is constructed as intermediate plate and extends from the edge of the cylinder bore also up to its cylinder axis; essentially only circular opening... | 12/31/1985 |
| 4553736 | Pneumatic plunger-type valve A valve device providing control of fluid pressure flow between a supply chamber and a delivery chamber by a movable plunger which forms a seal between the chambers when seated against a stationary supply valve seat and which establishes flow of fluid pre... | 11/19/1985 |
| 4522225 | Cock for the heating circuits of a vehicle A valve for vehicle liquid heating circuits that includes a sealed case, an inlet, an outlet and a mechanism for opening and closing at least one of said inlet and said outlet. The valve includes a guide means for mounting a member having a rack thereon a... | 06/11/1985 |
